This example shows how to set the the node image file based on the data. The expanded nodes are shown with a white king. If the node is collapsed, it changes to a black king.
Acknowledgements:
<!DOCTYPE html>
<meta charset="utf-8">
<head>
<script src="https://d3js.org/d3.v6.min.js"></script>
<script src="https://cdn.jsdelivr.net/gh/EE2dev/d3-indented-tree/dist/latest/d3-indented-tree.min.js"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/EE2dev/d3-indented-tree/dist/latest/d3-indented-tree.css">
</head>
<body>
<!-- paste data in aside tag -->
<aside id="data">
key,parent,size,weight,color,image1,image2
Eve,,3.45,25,yellow,"../images/bK.svg","../images/wK.svg"
Cain,Eve,4.647,20.3,black,"../images/bK.svg","../images/wK.svg"
Seth,Eve,3,20.3,steelblue,"../images/bK.svg","../images/wK.svg"
Enos,Seth,4,3000,orange,"../images/bK.svg","../images/wK.svg"
Noam,Seth,50000,30,green,"../images/bK.svg","../images/wK.svg"
Abel,Eve,4,30,brown,"../images/bK.svg","../images/wK.svg"
Awan,Eve,3,30,deeppink,"../images/bK.svg","../images/wK.svg"
Enoch,Awan,7,30,blue,"../images/bK.svg","../images/wK.svg"
Azura,Eve,2,30,red,"../images/bK.svg","../images/wK.svg"
</aside>
<script>
const url = "https://cdn.jsdelivr.net/gh/EE2dev/d3-indented-tree/test/blocks/";
const dataSpec = {
source: "aside#data",
};
const myChart = d3.indentedTree(dataSpec)
.margin({top: 50, right: 10, bottom: 20, left: 50})
.nodeImageFile(d => d._children ? url + d.data.image1 : url + d.data.image2 , { width: 20, height: 20})
.linkLabel("weight", {unit: " Euro", format: ",.2f", locale: "DE"})
.nodeLabelPadding(100)
.linkWidth("weight",{range: [150, 300]})
.linkHeight(50)
.nodeLabelPadding(20)
;
showChart(myChart);
function showChart(_chart) {
d3.select("body")
.append("div")
.attr("class", "chart")
.call(_chart);
}
</script>
</body>
</html>